New port```
[NEW] mail/py-offlineimap3.: Two-way synchronization of local Maildir and IMAP folders
Two-way synchronization of local Maildir and IMAP folders, the python3OfflineIMAP is software that downloads your email mailbox(es) as
version of local Maildirs. OfflineIMAP will synchronize both sides via IMAP.
WWW: https://github.com/OfflineIMAP/offlineimap.3
```
Add patch [1] to fix spaces in idle folders.
[1] https://github.com/OfflineIMAP/offlineimap3/issues/109